Colour

#400B01

#400B01
Red
Dark
Nearest: Black

#400B01 is a red with RGB values 64, 11, 1 and HSL 10°, 97%, 13%. It is a dark colour, so white text on it reaches 16.6:1 contrast (AAA for normal text). The nearest named colour is Black.

Colour values

#400B01#400B01

HEX#400B01

RGBrgb(64, 11, 1)

RGB (0–1)0.251, 0.0431, 0.0039

RGB percentages25.1%, 4.3%, 0.4%

HSLhsl(9.5, 96.9%, 12.7%)

HSV / HSBhsv(9.5, 98.4%, 25.1%)

CMYK0%, 82.8%, 98.4%, 74.9%≈naive device-independent conversion; real print needs an ICC profile

24-bit integer4,197,121

CSS custom property--colour: #400B01;

Brightness & contrast

Relative luminance0.01332WCAG 2.x, 0 is black and 1 is white

Perceived brightness36 of 255ITU-R BT.601 weighting

Light or darkDark

Best text colour on this backgroundWhitecontrast 16.58:1

Contrast with white16.58:1WCAG normal text: AAA

Contrast with black1.27:1WCAG normal text: Fail

Greyscale equivalent#161616

Inverted#BFF4FE

Colour vision & accessibility

Normal vision Protanopia Deuteranopia Tritanopia

Protanopia#1B1700no red cones; affects about 1% of men; ΔE 27.6 from the original

Deuteranopia#282300no green cones; the most common form, about 1% of men; ΔE 27.6 from the original

Tritanopia#480009no blue cones; rare, and affects men and women equally; ΔE 8.1 from the original

Distinguishable without hueYesnever rely on hue alone to carry meaning

Contrast with white, large text16.58:1WCAG large text: AAA

Contrast with black, large text1.27:1WCAG large text: Fail

Named colours

Black · ΔE 32.4 Maroon · ΔE 34.1 Saddle brown · ΔE 35.1 Sienna · ΔE 37.4 Brown · ΔE 38.3 Dark red · ΔE 39.1

Nearest named CSS colourBlack (#000000)ΔE 32.44, a distinctly different colour

Hue familyred

CSS keyword usableNo exact keyword

Colour harmonies

base +30°+90°+120°+180°+210°+240°+270°+330°

Complementary#013640

Analogous#400116, #402A01

Triadic#01400B, #0B0140

Split complementary#01402A, #011740

Tetradic#174001, #013640, #2B0140

Tints, shades & saturation

+40%+30%+20%+10%base -10%-20%-30%-40%

Lighter +40%#FB3712

Lighter +30%#D72503

Lighter +20%#A41C03

Lighter +10%#721402

Darker −10%#0E0200

Darker −20%#000000

Darker −30%#000000

Darker −40%#000000

More saturated +25%#410A00

Less saturated −25%#381109

Channel breakdown

R64

G11

Red64 (25.1%)

Green11 (4.3%)

Blue1 (0.4%)

Hue9.52°

Saturation (HSL)96.92%

Lightness12.75%

Dominant channelRed

Hex per channelR 40 · G 0B · B 01

Keep nerding

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#400B01

Colour values

Brightness & contrast

Colour vision & accessibility

Named colours

Colour harmonies

Tints, shades & saturation

Channel breakdown

Keep nerding

Harmonies

Lighter and darker

Similar named colours

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